1,429 results · Feed
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Medium 6.5
Memory safety bugs fixed in Firefox 135.0.1
Memory safety bugs present in Firefox 135. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 135.0.1.
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Critical 9.8
Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.…
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Critical 9.8
Memory safety bugs fixed in Firefox 135 and Thunderbird 135
Memory safety bugs present in Firefox 134 and Thunderbird 134. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefo…
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Critical 9.8
Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird 128.7
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could ha…
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Medium 6.5
Potential opening of private browsing tabs in normal browsing windows
A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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High 8.8
Certificate length was not properly checked
Certificate length was not properly checked when added to a certificate store. In practice only trusted data was processed. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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Medium 4.3
Fullscreen notification not properly displayed
The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
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Critical 9.8
Use-after-free during concurrent delazification
A race during concurrent delazification could have led to a use-after-free. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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Critical 9.8
A bug in WebAssembly code generation could result in a crash
A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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Critical 9.8
Use-after-free in Custom Highlight
An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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High 7.3
Fullscreen notification is not displayed when fullscreen is re-requested
The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
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Critical 9.8
Use-after-free in XSLT
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
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Critical 9.8CVE-2025-0247 EPSS 11%
Memory safety bugs fixed in Firefox 134 and Thunderbird 134
Memory safety bugs present in Firefox 133 and Thunderbird 133. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefo…
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Medium 6.5CVE-2025-0242 EPSS 15%
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5, Thunderbird 115.18, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could ha…
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Medium 5.1
Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.…
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High 7.7
Memory corruption when using JavaScript Text Segmentation
When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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Medium 5.3
Use-after-free when breaking lines in text
Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 12…
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Medium 4.0
Alt-Svc ALPN validation failure when redirected
When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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Medium 4.0
Compartment mismatch when parsing JavaScript JSON module
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
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Medium 5.4
WebChannel APIs susceptible to confused deputy attack
The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox…
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Medium 6.5
Missing thread synchronization primitives could have led to a data race on members of the PlaybackParams structure. Thi…
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High 8.8
Memory safety bugs present in Firefox 132, Firefox ESR 128.4, and Thunderbird 128.4. Some of these bugs showed evidence…
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Critical 9.1
`NSC_DeriveKey` inadvertently assumed that the `phKey` parameter is always non-NULL. When it was passed as NULL, a segm…
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Medium 6.5
A null pointer dereference may have inadvertently occurred in `pk12util`, and specifically in the `SEC_ASN1DecodeItem_U…
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High 8.8
When handling keypress events, an attacker may have been able to trick a user into bypassing the "Open Executable File?…
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Critical 9.8
A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path. Under speci…
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Medium 5.4
The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature ve…
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Medium 5.4
A crafted URL containing Arabic script and whitespace characters could have hidden the true origin of the page, resulti…
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Medium 5.7
On Android, Firefox may have inadvertently allowed viewing saved passwords without the required device PIN authenticati…
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Medium 6.1
Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS th…
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Medium 4.3
The incorrect domain may have been displayed in the address bar during an interrupted navigation attempt. This could ha…
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Medium 4.3
An attacker could cause a select dropdown to be shown over another tab; this could have led to user confusion and possi…
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Medium 5.3
matrix-js-sdk has insufficient MXC URI validation which allows client-side path traversal
matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. matrix-js-sdk before 34.11.0 is vulnerable to client-side path traversal via crafted MXC URIs. A malicious room member can trigger clients based on the matrix-js-sdk to issue arbit…
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Critical 9.8
Potential race conditions in IndexedDB could have caused memory corruption, leading to a potentially exploitable crash.…
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Critical 9.8
Memory safety bugs present in Firefox 131, Firefox ESR 128.3, and Thunderbird 128.3. Some of these bugs showed evidence…
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High 7.5
By sending a specially crafted push message, a remote server could have hung the parent process, causing the browser to…
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High 7.5
A clipboard "paste" button could persist across tabs which allowed a spoofing attack. This vulnerability affects Firefo…
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High 7.5
Repeated writes to history interface attributes could have been used to cause a Denial of Service condition in the brow…
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High 7.5
Video frames could have been leaked between origins in some situations. This vulnerability affects Firefox < 132, Firef…
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High 7.5
Truncation of a long URL could have allowed origin spoofing in a permission prompt. This vulnerability affects Firefox …